| Autor: |
McCall, G. N., Colton, R. H., Rabuzzi, D. D. |
| Zdroj: |
Journal of the Acoustical Society of America; 1973, Vol. 53 Issue 1, p345-345, 1p |
| Abstrakt: |
EMG studies were conducted on eight patients with nontremor related spasmodic dysphonia. Bipolar hook-wire electrodes were inserted into the cricothyroid, sternothyroid, and throhyoid muscles of each patient. The electromyographic activity from each muscle was recorded along with the voice of each patient on a multichannel FM data recorder for subsequent writeout and analysis. Data were obtained during quiet respiration, as well as during each patient's utterance of a standard sequence of isolated vowels, CV syllables, words, and contextual speech. Data analyses revealed that the characteristic intermittent voice stoppage episodes exhibited by patients with spasmodic dysphonia occur in association with sharp, burst-like increases in EMG activity in the cricothyroid and in some instances the sternothyroid and thyrohyoid muscles. Patients with spasmodic dysphonia tend to show prolonged contraction of the muscles under study prior to and following phonation. The postphonatory time data provide evidence suggestive of a problem in muscle relaxation. Implications of these preliminary observations will be discussed and directions for further investigation suggested. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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